Interlocking angle-joint.



No. 782,639. PATENTED FEB. 14,1905..`

- y s. R. BAILEY.

-- INTBRLOCKI N G ANGLE JUINT. APPLIOATION FILED 11,111.22, 1904.

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UNITED STATES Patented February 14, 1905.

Frisia.

lPATENT INTERLOCKING ANGLE-JOINT.

SPECIFICATION forming part of Letters Patent No. 782,639, dated February14, 1905.

Application filed March 28, 1904. Serial No. 200,294.

To all who-m it may concern: 1

Be it known that I, SAMUEL R. BAILEY, a citizen of the United States,and a resident of Amesbury, in the county of Essex and State ofMassachusetts, have invented certain new and useful Improvements inInterlocking Angle-.Ioints, of which the following is a specioation. l

This invention relates to improvements in making interlockingangle-joints at the junction of wooden plates for the purpose ofrendering the joint of the greatest strength possible without additionalstays or braces and also for the purpose of making what is termed a iblind or concealed joint at thecorner, in which the interlockingAtongues are not visible. l

This my improved joint is especially useful on carriage-bodies or thelike, in which it is desirable to secu re the corner portions of theplates together as strongly and firmly as possible and at the same timeto-produce a blind or concealed joint at the corner of the intersectingsurfaces. Although especially advantageous on carriage-bodies, co., itis equally useful for other purposes where wooden plates are to besecured together ata right angle or more or less acute or obtuse, as maybe desired.

The invention is carried out as follows, reference being had to theaccompanying drawings, wherein- Figure l is an end elevation of twoplates joined together at the angle thereof in accordance with myconstruction. Fig. 2 is a sectional view of the two wooden plates beforebeing secured together. Fig. 3 is a similar sectional view showing thesaid plates interlocked and secured together. Fig. 4 is a bottom planview of the interior portion of the plates before being securedtogether.

Similar letters refer to similar parts wherever they occur on thedifferent parts of the drawings. g

A and B representa pair of .wooden plates to be joined together at anangle relativeto each other, as shown in Figs. 1 and 3. At the jointedend the plate A is provided with tongues a t and intermediate grooves aa', as shown. In a similar manner the jointed end of the plate B isprovided with grooves 5 and intermediate tongues b/ t', said tongues andfin the groove d in the opposite plate, as

shown. y

The end a* of each tongue a on the plate A is inclined and adapted to itagainst and'contact the under side of a corresponding wedgeshapedportion Int at the bottom of the groove b on the plate B, and in asimilar manner the end 65 of each tongue b on the plate B is inclinedand adapted to tit against and contact the inside of a correspondingwedge-shaped portion a5 at the bottom of the groove c on the plate Awhen the plates are assembled as shown in Figs. 1 and 3. The wedgeportions a* and b4 terminate, preferably, as respective feather or knifeedges rfb, as shown in Figs. l, 2, and 3, by which construction thejoint at the corner between the interlocking tongues and grooves isconcealed.

The interlocking parts on the plates when assembled are united by glueor other equivalent adhesive material. y

It will be noticed that the ends of the overlapping projections @5 b*serve to cover and conceal the grooves in the respective plates when thelatter are assembled, as shown.

What I wish to secure by Letters Patent and claim isl. Theherein-described interlocking anglejoint, including a pair of sectionshaving interlocking tongues and grooves, the tongues of each sectionbeing of uniform width with the sections, and provided with inclinedends and each of said grooves correspondingly shaped to the tongues tointerlock and contact, substantially as described.

2. The herein-described interlocking angle- In asimilar manner the inneredge joint consisting of a pair of plates having re- In testimonywhereof I have axed rnv sigspeotive ,interlocking tongues and grooves, 1nature in presence of two Witnesses. l each of said tongues havlng theirlnner edge in parallelism with the inner face of the plate, SAMUEL R'BAHJEY' 5 and provided with a slightly-inclined end, and fitnessesz eachof said grooves correspondingly shaped ALBAN ANDRN,

to the tongues, substantially as described. ALVAH C. STONE.

